Cylinder cock



Nov. 15, 1938.

' nil c. w. PLOEN Er AL CYLINDER 000 Filed Sept. 28, 1936 llllWlHPatented Nov. 15, 1938 UNITED STATES PATENT OFFICE CYLINDER COCK CurtisW. Ploen, Chicago, 111., and Augustine It. Ayers, Shaker Heights,Cleveland, Ohio, assignors to The Okadee Company, Chicago, 111., acorporation of Illinois Application September 28, 1936, Serial No.102,924 1 Claim. (01. 121-134) The invention relates to automaticcylinder the casing; a spring l'l between cap l6 and cocks. plunger IIwith its ends held in sockets in said One object of the invention is toprovide an cap and plunger for normally unseating the valve improvedautomatic cylinder cock which com- 1; a lateral offset I9 of the casing6 containing a I prises a spring for opening the drain-valve, whichchamber 20 which communicates with the cham- 5 is enclosed but locatedoutside of thehigh tember 2& around the valve 1; a pipe 2| connectedperature steam cavity of the cock. By reason to the offset l9 whichleads from one end of the of this location, the spring can not foul themoveengine-cylinder a to subject one side of valve 1, ment of thecylinder cock in the event the spring when it is closed, to enginecylinder pressure; a 10 becomes broken, can be easily examined andrepipe 18 threaded into one side of the casing 6 10 placed withoutdismantling of the cylinder cock, to deliver steam from the boiler tothe cylinder l0 and is not affected by the high steam temperain thecasing, for exerting pressure against it to tures in the cock. close thevalve 1 against the force of spring l1 Another object of the inventionis to provide and the steam under cylinder pressure acting on 5 meanslocated in the cap of the casing by which the other side of the piston9. The differential 15 the drain-valve can be closed and kept closed inareas on the opposite sides of piston 9 and valve 1 the event of abroken pipe in the line' which are such as to permit the engine-cylinderpressupplies steam from the boiler for closing the sure, when it becomesexcessive or abnormal, to drain-valve, while the engine is operated toperopen the valve 1 and relieve such pressure.

mit the operation of the locomotive until repairs In practice, one ofthese cocks is applied to each 20 can be made, and also to close thecylinder cock end of the cylinder, as well understood in the when thelocomotive is undergoing a hydrostatic art. Pipes 18 from the ends ofthe cylinders are test, connected to a common pipe 23, which leads toAnother object of the invention is to provide a the engine-cap and isthere provided with a valve cylinder cock with a casing which isprovided for controlling the delivery of steam under boiler 25 with aplurality of inlets which makes the cylpressure to the cylinder H! foroperation of the inder cock symmetrically applicable to the right piston9 and valve 1, as well understood in the or left-hand cylinders, or tobe differently posiart. A port l3 provided in the bottom of the tionedwith respect to the cylinders. cylinder extension l3, serves as a smallvent and Other objects of the invention will be apparalso as a drain forany moisture. 30 ent from the detailed description. In the operation ofthe improved cylinder cook,

The invention consists in the several novel feathe spring I! will keepvalve 1 unseated except tures which are hereinafter set forth and arewhen steam is delivered under boiler pressure more particularly definedby the claim at the through pipe I8 to the cylinder Ill at one sideconclusion hereof. of the piston 9. The valve 1, when the engine 35 Inthe drawing: Fig. 1 is a side elevation of an is not operating, will beopen and will permit the engine cylinder having a pair of cylinder cockscylinder to drain through the cylinder cocks. The respectively connectedto the ends thereof. Fig. valve 1 will remain open while the engine isin 2 is a horizontal section of the improved cylinder operation untilthe engineer opens the valve 24 cock. Fig. 3 is a plan. Fig. 4 is asection on line in the cab to admit steam from the boiler which 40 4-4of Fig, 2, is greater than cylinder pressure, into one side Theinvention is exemplified in a cylinder cock of cylinder ID. This willshift piston 9 to the left comprising a casing 6; a valve 1 adapted toclose and force the valve I against its seat 8. If, duragainst a seat 8;a piston 9 integrally formed with g the ope n of he e g ne and While thevalve 1 and slidably mounted in a cylinder 10 valve 1 is closed, anyexcessive or abnormal con-- 45 formed in the casing 6; a head or plungerll dition develops in the cylinder, such as a slug of integral with astem, extending outwardly from water, the pressure in chamber 20 will besuffivalve 1 and through the valve-seat 3 and slidably cient to forcethe piston 9 to the right against the guided in a cylinder l3 formed inan e t n i n force of the steam in the outer end of cylinder I0,

It at one end of the casing 6; a drain-outlet l4 thus eliminating thepossibility of damage to the 50 at the outer side of the valve-seat 8; acap [5 cylinders and Working machine. When the screw-threaded into oneend of casing B and 00- Steam is cut off from p p l3 d y e "1 the axialwith the cylinder II]; a cap l6 screw- 000k W be p p to drain the engineY threaded into and closing the outer end of exinders.

tension l3 of the casing at the opposite end of The location of thespring is an important fea- 55 polygonal terminal screw may be securelylocked in position. The head 28 is provided with an inture because it islocated outside of the high temperature steam cavity 2|] in the casing6. When the spring is located in the high temperature steam cavityaround the valve 1, it is subjected to superheated steam temperatures,which is likely to cause breakage and if the spring becomes broken whenlocated in such cavity, it sometimes fouls the movement of the valve. Inthe construction set forth, the spring I! is 10- ture because it islocated outside of the high temperature because it acts on a plunger onthe valve stem I2 which is located in an extension of the casing beyondthe drain cavity M. This location also makes it possible to readilyexamine the spring upon removal of the cap l6 and to readily replace thespring without dismantling the cylinder cock. The valve seat 8 is formedin a ring 8 of heat-treated non-corrosive metal, which is pressed into asocket in the casing and around the ring.

In practice, it sometimes occurs that it is desirable to close thecylinder cock, for example, in the event of abroken steam pipe. It isalso necessary to close the cylinder cock when the locomotive isundergoing a hydrostatic test. In order to permit the valve to be heldclosed, a screw 26 extends, and is threaded, through the cap l and isprovided at its outer end with 9, whereby the screw may be turned and atits inner end with a head 28 which is adapted to engage a stem 29integral with the piston v9 and valve 1. By turning the screw 26, itshead 28 will engage the stem 29 and force the valve 1 against its seat.A lock-nut 30 is applied to the outer'end of screw '26 so that the itsinoperative wardly flared annular face and the cap is. provided with acorrespondingly tapered annular seat against which the face on the headcan be forced by the screw. This makes it possible to prevent theleakage of steam around the screw Without the use of packing and byscrewing the flared face tightly against the seat.

In practice, it is desirable to adapt the cock so it can be reversiblypositioned with respect to the engine cylinders. For this purpose, theoffset IQ of the casing is provided with a screwthreaded opening 32 inboth the upper and lower walls of the ofi-set I9. A screw-plug 33 isadapted to close one of the openings while a pipe 2! is connected to theother. The plug 33 and the pipe 2| may be screwed into either wall ofthe casing as desired, so the casing can be reversed with respect to theengine.

The invention is not to be understood as restricted to the details setforth, since these may be modified within the scope of the appendedclaim, without departing from the spirit and scope of the invention.

Having thus described the invention, what We claimas new and desire tosecure by Letters Patent is:

In an automatic cylinder-cock, the combination of a casing provided witha drain-port, a piston within the casing, means for communicatingboiler-pressure to one side of the piston and cylinder-pressure to theother side, a valve operable by said piston to close spring for openingthe valve, a the casing, and a screw in closing the valve, the screwhaving a head at its inner end provided with an inwardly flared annularface, the cap having a correspondingly tapered annular seat againstwhich the face on the head can be forced by the screw to prevent theleakage of steam around the screw.

cap at one end of the cap for manually CURTIS W. PLOEN. AUGUSTINE R.AYERS.

the drain-port, a

